Paper pleating machine



Sept. 28, 1937. F. SCHWARTZ 2,094,415

I PAPER PLEATING MACHINE I Filed May 6, 1955 4 Sheets-Sheet 1 Sept. 28,1937. F. SCHWARTZ 2,094,415

- PAPER PLEATING MACHINE Filed May 6, 1955 4 Sheets-Sheet 2 1.1," III ISept/28, 1937. F. SCHWARTZ PAPER PLEATING MACHINE 4 Sheets-Sheet 5 FiledMay 6, 1955 Sept. 28, 1937. W T 2,094,415

PAPER PLEAT ING MACHINE Filed May 6, 1955 4 Sheets-Sheet 4 g Q "-flLI'LHIIL \l l J amen WM W P p Patented Sept. 28, 1937 UNITED STATESPATENT} OFFICE PAPER PLEATING MACHINE Fred Schwartz, Green Bay, Wis.,assignor to Fort Howard Paper Company, Green Bay, Wis., a

corporation of Wisconsin Application May 6, 1935, Serial No. 20,064

3 Claims. (01. 154-30) 10- vide a machine for pleating paper by the useof elastic belts succeeded by forming devices and pressure rolls tofinally complete the pleats.

Further objects of the invention will appear from the followingdescription when read in connection with the accompanying drawingsshowing an illustrative embodiment of the invention, and wherein:

Figure 1 is a plan view;

Fig. 21s a vertical section on line 22 of Fig. 1;

Fig. 3 is a plan view of a portion of a pleat designed to coact with theelastic belts;

Fig. 4 is a perspective view of one of the final pleating blocks;

Figs. 5, 6, 7, 8, and 9 are detail transverse sections on thecorresponding section lines of Fig. 2;

Fig. 10'is a side elevation illustrating the roll driving mechanism; and

Fig. 11 is a detail cross section of the paper produced by the machine.

As shown the device comprises a pair of corrugated rolls I2, I3 mountedin standards I4, one of said rolls being provided with a sheave I5 bywhich the device is driven, and the rolls I2, I3 provided withinterengaging gears I6 for drive of the roll I2 from the roll I 3. Thereare also provided upper and lower rolls I1, I8, and I9, 20, which arecorrugated with the same number of corrugations as those of the rollsI2, I3, but in which the corrugations are more closely spaced than inthe first named rolls. The respective pairs of rolls I2, I3, I1, I8, andI9, 20, have their adjacent surfaces in alignment.

Mounted to travel in the corrugations 2I, 22 of the rolls, there areshown belts 23, 24. The belts for the upper and lower rolls respectivelyare shown as staggered. Because of the fact that the corrugations 2| and22 in the rolls l1, I8, and I9, 29 are more closely spaced than those ofthe rolls I2, I3, a web of paper 25 fed between the belts upon the rollsI2, I3 .will have its width reduced in its travel from rolls I2, I3 tothe rolls I1, I8.

To guide the paper during its width-narrowing travel, there are shownupper and lower corrugated plates 26, 21 having corrugations to receiveand guide the belts 23, 24 and the paper extending over and under thesuccessive belts transversely of the machine.

The plates 26, 21 are shown as mounted in the standards I4 and thestandards 28, 29, the lat- 5 ter supporting the rolls I1, I8 and rollsI9, 20 respectively by means of brackets 30, 3| respectively andprovided for necessary adjustment toward and from each other by slottingof the vertical portions of the brackets.

The paper leaving the rolls I9, 20 is immediately received betweenspaced vertical pleating blocks 32, 33 which are similar and placed instaggered relation as by being mounted upon rods 34, 35 supportedbetween brackets 36, 31, Fig. 1, for vertical adjustment. The blocks 32,33 are shown as rounded at 38 at the paper entering ends thereof, whichrounded form tapers to a flattened form at 39, see Fig. 4. The blocks32, 33 may be adjusted for spacing upon the rods 34, 35 by loosening setscrews 40, 4i and moving the same upon the rods in an obvious manner. Apair of press rolls 42, 43 are mounted in standard 44 closely adjacentthe flattened ends of the blocks 32, 33 so that the paper leaving saidblocks is immediately received in the bite of the rolls and pressed tothe final form illustrated in Fig. 11.

It will be seen from Fig. 9 that the pleating blocks 32, 33 have theirflattened ends 39 lying in such relation as to bring the paper to thefinal pleating form ready for operation thereon by the press rolls 42,43.

The pairs of rolls i1, I8, I9, 20, and 42, 43 are driven from each otherby inter-engaging gears 35 45, 46, 41, respectively. The roll I2 isdriven from the roll I3 in the manner already described. The roll I1 isdriven from the roll I2 by means of a sprocket chain '48. The roll 20 isdriven from the roll I8 by means of a sprocket chain 49. The 40 roll 42is driven from the roll I9 by means of a sprocket chain 50.

The brackets 36, 31 are shown as supported from a standard 5|.

It is to be understood that the paper taken from 45 the feed roll 52 ispreferably previously corrugated and after running through the machineit may be wound upon a storage roll 53.

The belts 23, 24 are preferably formed of helically wound resilient wireand are placed upon the rolls under tension.

The function of the rolls l1, I8 is to give a straight line paralleltravel of the belts 23, 24 at the last end of their path in contact withthe paper whereby the corrugations of the paper are finally straightenedready for action thereon by the blocks 32, 33.

The rolls I1, 58 may be omitted if desired without rendering the deviceinoperative.

5 Because the belts 23, 24 are elastic and are under some degree oftension, they will faithfully follow the corrugations of the rolls l1,[8 in passing from converging paths to parallel paths.

The paper may be treated in dry and its per- 13 centage of possiblestretch will be the difference between the length of the rolls [2, l3and that of the rolls i9, 20.

Minor changes may be made in the physical embodiment of the inventionwithin the scope of 15 the appended claims without departing from thespirit thereof.

I claim: 1. In a machine of the class described, in combination: aplurality of pairs of upper and lower grooved rolls comprising upper andlower sets; the grooves in the paper-entering pair more widely spacedthan and of the same number as the grooves of the succeeding rolls; thegrooves of the second and third pairs equally spaced; upper' and lowersets of endless bands mounted in altermate of said grooves of the upperand lower sets of rolls; grooved plates to guide said bands from thefirst to the second pairs of rolls, said grooves converging toward therolls of said second pair;

whereby a sheet led between said upper and lower sets of bands will begiven a transversely undulant form progressively decreasing in width tothe sec- 0nd pair of rolls and straightened to the third pair; means toreceive the undulations and pro gressively guide portions thereof intooverlapping relation with other portions thereof; and a press roll tocompress the thus formed fold lines.

2. A paper pleating member comprising an elongated block, convex at oneedge at one end thereof, said edge progressively flattening to a planesurface at its remaining end; said last named end having portionsprojecting beyond the side surfaces of the block adjacent said planesurface to provide abrupt shoulders at the said pro jections.

3. In a machine of the class described, in combination: means to deforma moving sheet of paper into longitudinally extending roundedcorrugations; upper and lower opposed sets of pleating members at theopposite sides of the path of said moving sheet; each of said memberscomprising a block set edgewise to said path and the edges thereof eachconvex at the paper entering end of the sets; said edges progressivelyflattening to plane surfaced edges at the delivery end thereof andprogressively widening to portions projecting beyond the side surfacesof the members providing overlapping shoulders upon the opposed membersof the sets; said shoulders on each set spaced from the opposedshoulders a distance substantially equal to-the thickness of the sheet,and means to press the resulting pleats.

FRED SCHWARTZ.

